Audio converter
Choose an audio file your browser can play and save it as an uncompressed 16-bit WAV. Where the browser supports recording, you can also get a compressed file in its own format; the tool tells you which one before you convert.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Choose an audio file.
- Pick WAV or, if shown, Compressed.
- Press Convert, listen to the preview and download the file.
How it works
The file is decoded by the browser into samples at 44.1 kHz (stereo at most). For WAV the samples are rounded to 16 bits and written with a standard RIFF header. For the compressed option the samples are played into a MediaStreamAudioDestinationNode that feeds a MediaRecorder; the first container the browser supports from WebM/Opus, WebM, MP4/AAC and Ogg/Opus is used. Files can be up to 100 MB and 10 minutes of audio.
Worked example
A 3:00 stereo MP3 becomes a WAV of 3 x 60 x 44,100 x 2 channels x 2 bytes, about 31.8 MB.
Tips
- Use WAV when another program needs plain, uncompressed audio.
- Keep the compressed option for small files that only need to play in browsers and phones.
Frequently asked questions
Which formats can it read?
Anything your browser can decode. Typically MP3, WAV, M4A/AAC, OGG and Opus, and in most browsers FLAC. If your browser cannot decode a file, the tool says so; it has no decoders of its own.
Which formats can it write?
Always WAV, 16-bit PCM. If your browser supports recording audio, a second option appears with its own format: WebM with Opus in Chrome, Edge and Firefox, MP4 with AAC (.m4a) in Safari. There is no MP3 output, because browsers cannot encode MP3.
Why does the compressed option take time?
The browser can only compress audio while recording it, so the decoded sound is played silently into the recorder in real time. A 3-minute clip takes about 3 minutes. WAV is instant.
Is anything lost?
Converting to WAV does not lose quality beyond the original compression and the rounding to 16 bits; the sound is resampled to 44.1 kHz when decoded. The compressed option adds another lossy step.